1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ce7f44f2e1d89baff3e7366f416efb4f6b22d1462a1fa7cc12456d7aacef94. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bfe3ecb-17b1-418e-aa23-cb096b47244b.json and https://artists.proofprofile.net/proofs/artist/6bfe3ecb-17b1-418e-aa23-cb096b47244b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01f50260b6df4be967fab3e753320bf78a2ef1e82dfde79f39f4d339f75343a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2023401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f3ca651f200c5640bf47c30688eec93e907b3f0436dc6786684af77f1d5af5. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2036392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98c5a8dfe65bef9a0ec5d01f12851a73a0939277983e9edda1a6d09cc52601e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2056277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf154255cf612e396acf13ea5c7c21761c8a3213e820b0584fff47efad1dcfc8b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2037464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cba580d4f778d31dfbcd50fda93fd93ff252fc58f0a736e6340a1d1ac6f5a4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2037465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97616a5044593c608d6340d77760ba9c82b999566ed2526ea2b10e0ac33ae376. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2037468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126db44abae4be2ed667725d1881bd8b5b00b690f981d69877f64632b0957a1d. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72381925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f54ffe0bd92b931de32990755933aa1f2597fb3dc4ac95619e3ff511a118d5. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72381926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3965331fd29a1aa511249abe4e894d3aceb3ff822d51c0e45bba631d8daaa168. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72381927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1886ff530a5a4e2c24613546ac492c08c93d0a58e72b07d3805cbbaa5a54d8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72381929.